Chain grate.



P. L. CROWE & A. FRA-NKENHEIM.

CHAIN GRATE. APPLICATION FILED NOV. 2l, 1914.

Patented Oct. 15, 1918.

PAUL L. CROWE, 0E JERSEY CITY, NEW JERSEY, AND AARON FRANKENHEIM, OF

NEW YoEK, N. Y.

CHAIN GRATE.

Specification of Letters Patent.

Patented Oct. 15, 1918.

Application filed November 21, 1914. Serial No. 873,272.

To all whom it may concern:

Beit known that we, PAULIJ; CR WE and AARON FRANKENHEIM, citizens of the United States, and residents, respectively, of Jersey City, county of Hudson, and State of New Jersey, and borough of Bronx, county of Bronx, and State of New York, have invented certain new and useful Improvements in Chain Grates, of which the followlinks of the cable chain, partly broken away,

the horizontal link being shown in section.

Fig. 2 is a view,in side elevation showing one end portion of the grate bar, the horizontal link being shown in section.

Fig. 3 is a detail sectional view on a reduced scale showing a modified construction of the attachment between the grate bar and the horizontal link.

Fig. 4: is a similar view showing a further modification.

Fig. 5 is a view similarto Fig. l, on a reduced scale, showing the attachment for the end of the holding pin of Fig. 4.

Fig. 6 is a view similar to Figs. 3 and 4, illustrating a further modification.

It will be understood that the two supporting chains are endless, passing around suitable sprockets at the front of the furnace and being driven slowly or intermittently, to feed a continuous layer of fuel into and through the combustion chamber of the furnace. In the present instance the grate is composed of transverse grate bars 1, and two endless chains, located along underneath the ends of the grate bars, and supporting them.

The terms horizontal and vertical links are used herein for convenience, to designate links which are parallel and perpendicular respectively to the plane of the grate.

Each bar comprises a longitudinal web portion 3, and a laterally projecting fuelbearing portion 4, of any suitable formation,

the exact shape of the grate bar not being essential.

At the end of the grate bar the depth of the Web is reduced from a point 5 to the end of the bar, and at an intermediate distance indicated at 6, an upwardly curved socketextends from the bottom to the outer end of the bar, which is recessed as at 5 for the reception of a holding device for the end of the removable curved attaching pin 7. This pin is a separable element, one end of the said pin having an enlarged head portion 10, and at the other end a transverse aperture 13, for the reception of a cotter or pin '14:. y

In attaching the grate-bar to the chains the said pin-is passed through the opening in 'thehorizontal link'll, and between the ends of two adjacent vertical links12, fitting this opening, and its upper end is inserted into the socket 6, where it is held in place by the retaining pin 14;. The head 10 lies beneath the horizontal link 11, and being too large to pass therethrough loosely secures the end ofthe bar to the chain.

The attaching pin 7 may be readily reversed, as shown in Fig. 6, and is attachable by inserting the pin 7 through the end of the bar and downwardly through thesaid link 11, the cotter or other pin 14 being passed through the transverse opening in the attaching pin beneath the link 11 of the chain.

It is to be noted that the head of the pin 7 is outwardly curved as the head is enlarged, so that at front and back downwardly and outwardly curved surfaces 15 are provided for engagement against the rounded ends of the vertical links 12 and inner sides of horizontal links 11, which are thus enabled to beproperly seated, and provide for free action around the supporting wheels.

The retaining pin performs its function reliably, and is of special advantage in that the case of its removal is not seriously affected by rusting or the action of heat on the metal parts.

In Fig. 3 we show a slightly modified arrangement, in which the socket opening 5 is set in bodily in the end of the grate bar, and in Fig. 4: the same arrangement is shown, with the cotter pin arranged vertically. V 3

Fig. 5 shows the socket for the cotter pin as vertically arranged, of oblong form.

The subject matter of this application was in part disclosed in our prior application .Ser. No. 400,722,- filed Nov. 4, 1907, but is not therein claimed, such claims being reserved for this application with benefit of the filing date of the earlier case.

' What we claim as new is:

1. In a chain grate, the combination with 'a cable chain comprising horizontal and vertical links, of a transverse grate bar comprising a longitudinal web portion having a depending stem and a laterally projecting fuel-bearing portion, said grate bar having a curved socket in the end of its web portion a removable curved attaching pin inserted upward into said socket through a horizontal link of said chain and having a head on its-lower end beneath said link, and a retaining pin passed through the upper portion of said attaching pin and holding the same in said socket.

2. In a chain grate, the combination with a cable chain comprising horizontal and vertical links, of a transverse grate bar comprising a longitudinal web portion and a laterally projecting fuel-bearing portion, said web' portion being recessed at the bottom'so as to be reduced in depth from a point adjacent one end of the bar to the end thereof and having a curved socket from said recessed region, to the end of the bar, a removable curved attaching pin inserted into said socket through a horizontal link of said chain and having a head on one end thereof, and a transversely securing opening at the opposite end.

3. In a chain grate, the combination with a cable chain comprising horizontal and vertical links, of a transverse grate bar comprising a longitudinal web portion and a laterally projecting fuel-bearing portion, said web portion being recessed at the bottomso as to be reduced in depth from a point adjacent the end of the bar to the end thereof and having a curved socket extending from said recessed region upwardly toward the fuel-bearing surface and to the end of the bar thereof, a removable curved attaching pin inserted into said socket through a horizontal link of said chain, said attaching pin having an enlarged portion on one end, said enlarged portion being curved to conform with the curvature of the horizontal links of said chain, said attaching pin having a transverse opening at its opposite end and a retaining pin passed through said opening beneath said fuelbearing portion.

4. In combination with supporting and carrying chains composed of freely connected links and grate bars having curved sockets intheir ends, loosely mounted-pins engaging said sockets and having enlarged heads engaged by said links.

5. In combination with supporting and carrying chains composed of freely connected links and grate bars having curved sockets in their ends provided with terminal enlarged sockets; curved connecting pins. eX- tending through said sockets and having enlarged heads engaging said links.

Signed at New York city, in the county,

of Bronx and State of New York this 20 day of November, A. D. 1914:. 7

PAUL L. GROWE.

AARON FRANKENHEIM.

Witnesses:

Lonrs A. CRoWE, GEoRsE F. BENTLEY.

Copies of this patent may be obtained for five cents each, by addressing t cpmmiissioner of Patents, I"

' Washington, D. C." V 

